docs: def _build_cmdargs(argv):
      """ Build command line arguments dict to use;
      - displaying usages
      - vint.linting.env.build_environment
  
      This method take an argv parameter to make function pure.
      """
      parser = _build_arg_parser()
      namespace = parser.parse_args(argv[1:])
  
      cmdargs = vars(namespace)
      return cmdargs